Big Sand Lake Weather Forecast

    • 45
    • 67

    Mostly Sunny

    • 42
    • 70

    Rain Likely

    • 39
    • 62

    Mostly Cloudy

    • 37
    • 61

    Rain

    • 33
    • 46

    Rain

    • 34
    • 52

    Mostly Sunny

    • 37
    • 58

    Partly Sunny

Today 9 Sep Southern Clearwater Mountains

Mostly sunny. Patchy fog early in the morning. Highs 66 to 81.

Tonight 9 Sep Southern Clearwater Mountains

Mostly clear. Lows 38 to 53.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Big Sand Lake Temperature Statistics

September Temperature

Missoula, Missoula International Airport (46.6 miles)

  • Lowest 1 September, 2026

    45.6 °F

  • Average September

    59.8 °F

  • Highest 1 September, 2026

    88.6 °F

Climate (2021–2026)

Missoula, Missoula International Airport (46.6 miles)

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  • Average Low 2021–2026

    36 °F

  • Average 2021–2026

    47.6 °F

  • Average High 2021–2026

    59.7 °F
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